Several days after the attack, the children were found by a Klingon warrior named Warrohk, who adopted and raised the children as his own. At first Idun and Gerda were frightened of Warrohk, but soon came to embrace the Klingon way of life.

In 2346, Morgen, the hereditary ruler of the planet Daa'V, joined the Stargazer crew. Morgen was a Daa'vit, a species that shared a mutual enmity with the Klingon Empire. Idun was able to suppress her Klingon nature, and work with Morgen, but her sister was not.

Around 2350, Gerda unsuccessfully attempted to murder Morgen, claiming Klingon bloodright, and was tried and found guilty of attempted murder. Idun's sister served her sentence, but was killed shortly thereafter in an accident aboard a freighter she was serving on. (TNGnovel: Reunion)

In 2367, Idun received an invitation from Morgen to attend his coronation as king of Daa'V. Given her sister's past with Morgen, she briefly considered not attending. On the journey to Daa'v onboard the USS Enterprise-D, attempts were made on the lives of Morgen and Captain Gilaad Ben Zoma. Evidence was planted implicating Idun, and she was confined.

Greyhorse had been having a secret relationship with Gerda for several years before her attack on Morgen. Greyhorse never recovered from Gerda's death, and sought revenge on those that he felt were responsible for her disgrace and death. Idun was cleared of all charges. (TNGnovel: Reunion)

In TNGepisode: "The Battle", Idun was played by Schae Harrison, with her dialogue recorded by a different unnamed voice actress. The character was seen but was not named, but author Christopher L. Bennett used the episode scene she appeared in as part of TNG - The Lost Eranovel: The Buried Age and assigned that position (the helm) and her dialogue to Asmund, creating a link between the two characters. There wasn't any explanation as to why she wore a blue sciences division uniform as a helmsman, but there is the possibility of a dual specialty.